Fastening for meeting-rails of sashes



(No Model.)

E. 0. LADD. v FASTENING FOR MEETING RAILS 0P SASHES.

WITNEESEEL A v UNTTED STATES PATENT Grinch.

EDWVARD O. LADD, OF EVERETT, MASSACHUSETTS.

FASTENING FOR MEETING-RAlLS OF SASHES.

SPECIFICATION forming part of Letters Patent No. 313,503, dated March 10, 1885.

Application filed November 22, 1884. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD O. LADD, of Everett, in the county of Middlesex and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Sash and Door Fasteners, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification in explaining its nature, in which Figure 1 represents a portion of an upper and lower sash, showing the meeting-rails and my improved invention. Fig. 2 is a vertical section thereof somewhat enlarged, and Fig. 3 is a plan view.

This invention is an improvement upon that described in my Letters Patent N 0. 296,188. In said patent I have shown and described a sashfastenerhaving an edge cam-bearing .plate and edge ratchet-plate, the plates or edge surfaces being independent of each other, but coincident in curvature, and a fastening bar or arm, which is like the ordinary bar or arm of such fasteners, with the exception that it carried a pawl which engaged with the teeth on the ratchet-plate.

In my present invention I make the ratchet plate movable and do not attach a pawl to the locking-bar, and while the effect of the two constructions is substantially the same, the

construction of the present invention is cheaper and less liable to get out of order.

Referring to the drawings, a represents the plate, which is fastened to the bottom rail of the top sash. To this plate is pivoted the locking arm or bar a in the ordinary manner, or, as shown in the drawings, by means of the cap a and the spring a This construction, however, is also old and common, and need not further be described here. The front end of the locking bar or arm has a downwardprojecting tongue, to, the upper inner edge, a ,of which is adapted to bear against the camplate hereinafter specified,and the lower inner edge, a of which is beveled, as represented, and forms the tooth or latch which engages with the teeth of the ratchet-plate.

B is the other member of the fastener. It has the cam-plate b,which is cast integral with or fastened to the base-plate b, which is spring so that the teeth I) thereon project beyond the edge of the cam-plate. The stop I) prevents the furthermovement of the ratchet-plate outward. The ratchet-plate also has the extension b which forms the thumb-piece by which it is moved inward against the stress of the spring b and a stop, b, limits its inward movement.

In the operation of locking, the shoulder upon the tongue of the locking bar or arm comes in contact with the edge of the camplate, and the tooth or latch a engages with the teethof the ratchet and presses the ratchetplate back as it clears each tooth until it is finally left. It will be seen that by this construotion,even if the locking-bar is not moved but a very little on the cam-plate, still the tooth or latch upon it will engage withthe teeth of the ratchet-plate almost simultaneously with the movement of the tongue by the edge of the cam-plate. The stops 0 c prevent the locking-bar from being moved beyond a line substantially at right angles to the line of the sash.

To disengage the locking-bar it is simply necessary to throw in the ratchet-plate, when the tooth which holds the locking bar or arm is disengaged, and it is moved back either by the spring or by hand.

The cheapness and advantages of the construction as compared with that described in my said Letters Patent are obvious.

Having thus fully described my invention, I claim and desire to secure by Letters Patent .of the United States 1. In a sash-fastening device, the combination of an edge cam-bearing plate and hinged edge ratchetplate, the plates or edge surfaces beingindependent of each other but coincident in curvature, and adapted to operate in connection with the locking bar or arm, substantially as and for the purposes described.

2. The sash-fastening device consisting of the plate a, provided with the locking bar or arm a, pivoted thereto, and having the tongue piece, b and adapted to operate in combinaa, having the bearingeurfaee a and teeth or Lion with the locking bar or arm a, all sub- ]atch a, in combination with the plate 1), prostantially as specified.

Vided with the circular edge cam-plate 7), cir- EDXVARD O. LADD. 5 cular edge ratchet-plate 6 formed coincident 'Witnesses:

with each other, the ratchet-plate being; mov F. F. RAYMOND, 2d,

able, as described,and provided withztthumb- 1 FRED. B. DOLAN. 

